Aww poop, I thought they could ship out of the states, sorry! For the bolt I've had very good results with the Harbor Freight HNBR set, though I have a feeling that they aren't available in Canada either

Size 002, 70-durometer Silicone, Red, FDA. Those will replace the silent fill o-ring, though if you're talking about the inner o-rings for the seals then I'm not sure.

Hello Gents,

Thanks for the reply, I've ordered some Frog Lube, and will pick that up this weekend.

As for the o-rings, I want all o-rings to replace and repair the LM4 without any down time.. the question is whether I should get the o-rings custom made with Viton or silicone, might get them both to test them up. I really do not know the difference, however the ones made with Viton are a bit more expensive.

I think you'll be good with the silicone. Silicone has great properties especially with high/low temperatures and is very resistant to all sorts of chemicals. I forget the exact wording but I'm fairly sure I recall reading that silicone is well suited for use with propane. I also used some spare nitrile o-rings before I ordered the silicone ones with good results. The mags that have had o-rings replaced with nitrile are still going strong so I think either of those materials will work well. Also just as a testament to Froglube, I've been using it in all three of my KWA's and they're in fantastic health because of it.

Stick with a very light amount of silicone oil for the first couple of months. Frog Lube is highly hyped and maybe shows incremental improvements in laboratory tests but the factory spec silicone lube works for airsoft (and CLP works fine in cartridge guns). Anyway don't mess with non-approved lubricants while the gun is in warranty. You can use KY Jelly or peanut butter after that if you want.

There is no call for grease in either the LM4 or M4. Grease adds friction and slows moving parts. Light oil is what's needed, not heavy. I've seen guys induce stoppages with grease but I'm sure many use it without problems, though.

I think you'll be good with the silicone. Silicone has great properties especially with high/low temperatures and is very resistant to all sorts of chemicals. I forget the exact wording but I'm fairly sure I recall reading that silicone is well suited for use with propane. I also used some spare nitrile o-rings before I ordered the silicone ones with good results. The mags that have had o-rings replaced with nitrile are still going strong so I think either of those materials will work well. Also just as a testament to Froglube, I've been using it in all three of my KWA's and they're in fantastic health because of it.

Haha, I read all the hype on the forums here, I plan on using it on my WE AK74UN as well!

Chuck S, on 01 August 2013 - 03:15 AM, said:

Stick with a very light amount of silicone oil for the first couple of months. Frog Lube is highly hyped and maybe shows incremental improvements in laboratory tests but the factory spec silicone lube works for airsoft (and CLP works fine in cartridge guns). Anyway don't mess with non-approved lubricants while the gun is in warranty. You can use KY Jelly or peanut butter after that if you want.

There is no call for grease in either the LM4 or M4. Grease adds friction and slows moving parts. Light oil is what's needed, not heavy. I've seen guys induce stoppages with grease but I'm sure many use it without problems, though.

-- Chuck

Hi Chuck,

So you recommend I only use silicone oil for the first couple of months, and not frog lube? Until of course warranty (not sure of the time) is over?

I'll keep that in mind! Yes I've read not to use any form of grease at all, it clogs any rifle

Interests:Keeping those damn squirrels from putting their filthy little paws on my peaches in my backyard. Oh, Yes. It's not just a hobby, its a passion!!

Country:

Posted 01 August 2013 - 06:35 AM

The only part that really needs lubing is the piston O-ring and there are many that run the bolt dry without issues. With that said I frog lube all my gbb guns and they have worked the best out of anything I have ever used. But I tend to still use a little silicone oil on the O-rings to be safe.

Chuck coming in with his " it's a gimmick" " tye rs counterpart doesn't need it so this doesn't" "it's overhyped" comments. A light coat of FL on the bolt works amazingly well, everything else just needs a tiny amount of silicone oil.